This classic hand aneroid is from Welch Allyn, the company with nearly one hundred years of experience designing and building the most accurate and durable aneroid sphygmomanometers in the world. The 509827 is certified accurate to ±3mmHg. The trigger deflation valve provides smooth one-finger control. The one-piece cuff is latex-free for safety and is durable and easy to use. The thermally treated diaphragm maintains its calibration. The ergonomic design works well in the right or left hand. Vinyl zipper case included.
delivery took over a week. do not understand why the high cost of the mailing and delivery why it took so long to deliver via fedex the product. Otherwise, the product is excellent, replacing my previous model over 15years old. definitely comfortable to handle and read with a generous size cuff.
long lasting and accurate